What Is a Generator Controller?
A generator controller (also called a genset controller or automatic controller) is the brain of your generator set. It monitors engine parameters, controls the start/stop sequence, protects the engine from abnormal conditions, and manages automatic mains failure (AMF) operations.
Key Functions
1. Engine Monitoring
The controller continuously monitors:
- Engine speed (RPM)
- Oil pressure
- Coolant temperature
- Generator voltage and frequency
- Load current
- Fuel level (if sensor installed)
- Running hours
2. Start/Stop Control
Controllers manage the entire start sequence: pre-heat, crank, detect running, and transition to load. The stop sequence includes cool-down running before shutdown.
3. Protection
Automatic shutdown on critical conditions:
- Low oil pressure
- High coolant temperature
- Over-speed
- Under-speed
- Over-voltage / under-voltage
- Over-frequency / under-frequency
4. Automatic Mains Failure (AMF)
In AMF mode, the controller monitors utility power. When mains fail, it automatically starts the generator and transfers load. When mains return, it transfers back and cools down the generator.
Major Controller Brands
DeepSea Electronics (DSE)
Industry leader from the UK. Known for reliability and advanced features. Popular models: DSE7320, DSE8610, DSE4520.
ComAp
Czech manufacturer with innovative control solutions. Popular models: InteliLite NT, AMF25.
SmartGen
Chinese manufacturer offering cost-effective controllers. Popular models: HGM6120, HGM6110.
Conclusion
Choosing the right controller depends on your application complexity, budget, and required features. Browse our controller range or contact us for advice.